US3963529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soldering flux
Assignee: Panasonic Holdings Corp
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Filing: 1975-02-03
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Granted: 1976-06-15
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Expires: 1995-02-03
Abstract
Abstract The invention relates to a novel non-corrosive rosin oil flux and a novel method of soldering which comprises the use of said flux.
Inventors
- 👤 Eiichi Tsunashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:43
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/3612
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
34 words
A soldering flux consisting of rosin oil having an average molecular weight of 120 to 80, which is obtained by cracking rosin at a temperature of 180°C to 250°C and then condensing the distillate.
Claim 2
Dependent Claim
34 words
A soldering flux consisting of rosin oil having an average molecular weight of 120 to 80, which is obtained by cracking rosin at a temperature of 180°C to 250°C and then condensing the distillate.
Claim 3
Dependent Claim
57 words
A soldering flux consisting of not less than 70 weight percent of rosin oil having an average molecular weight of 120 to 80, which is obtained by cracking rosin at a temperature of 180°C to 250°C, and then condensing the distillate, and the remainder being a solvent selected from the group consisting of alcohols, ketones and esters.
Claim 4
Dependent Claim
57 words
A soldering flux consisting of not less than 70 weight percent of rosin oil having an average molecular weight of 120 to 80, which is obtained by cracking rosin at a temperature of 180°C to 250°C, and then condensing the distillate, and the remainder being a solvent selected from the group consisting of alcohols, ketones and esters.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-15 | 1979-12-15 | 1980-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-15 | 1983-12-15 | 1984-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-15 | 1987-12-15 | 1988-06-15 | $7700.00 | Window Closed / Lapsed |